137221375 has 16 divisors (see below), whose sum is σ = 171842112. Its totient is φ = 109399200.

The previous prime is 137221367. The next prime is 137221397. The reversal of 137221375 is 573122731.

It is not a de Polignac number, because 137221375 - 2³ = 137221367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37894 + ... + 41356.

It is an arithmetic number, because the mean of its divisors is an integer number (10740132).

Almost surely, 2^137221375 is an apocalyptic number.

137221375 is a deficient number, since it is larger than the sum of its proper divisors (34620737).

137221375 is an equidigital number, since it uses as much as digits as its factorization.

137221375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3795 (or 3785 counting only the distinct ones).

The product of its digits is 8820, while the sum is 31.

The square root of 137221375 is about 11714.1527649250. The cubic root of 137221375 is about 515.7911928315.

The spelling of 137221375 in words is "one hundred thirty-seven million, two hundred twenty-one thousand, three hundred seventy-five".